Carriage return mechanism for com



Oct. 1. 1940. o. J. SUNDSTRAND CARRIAGE RETURN MECHANISM, FOR COMPUTINGAND PRINTING MACHINES Original Filed 'Dec. 18, 1931 7 Sheets-Sheet 1INVENTOR OSCARJSUIYDSTRAND.

ATTORNEY CARRIAGE RETURN MECHANISM FOR COMPUTING AND PRINTING MACHINES wOct. 1. 1940- o. J. SUNDSTRAND Original Filed Dec. 18, 1931 '7 Sheets-Sheet 2 ATTORNEY Oct. 1. 1940. 'Q J SUNDSTRAND 2,216,634 CARRIAGE RETURNMECHANISM FOR COMPUTING AN]? PRINTING MACHINES Original Filed Dec. 18,1931 V 7 Sheets-Sheet 3 INVENTOR OSCA/Fd Sl/l/DSTRA/VQ Piaf ATTORNEYr17- L g??? m,, 5 '3 I 6 H j w. I I w 7Z8 952 :2; nae 6/75 895 CARRIAGECARRIAGE RETURN SHORT RETURN 5 was i (1/ .5'87 R4 ,J

% INVENTOR oscA/m su/vosmA/va 0a. 1. 1940 o. J. SUNDSTRAND 2, 16,6 4

CARRIAGE RETURN HECHANISM FOR COMPUTING AND PRINTING MACHINES OriginalFiled-Dec. 18-, 1931 7 Sheets-Sheet 4 1940- o. .L suNpsTRAND 2,216,634

CARRIAGE RETURN MECHANISM FOR COMPUTING AND PRINTING MACHINES v OriginalFiled Deb. 18, 1931 7 Sheets-Sheet 5 .//////I 7 I 8 7 6% F\\ e97 IIIIIHI w|||||||||||mu mix V mu nun |||||1| ATTORNEY CARRIAGE-RETURN IECHANISMFOR COMPUTING AND PRINTING MACHINES O. J. SUNDSTRAND 7 Sheets-Sheet 6Original Filed Dec. 18, 1931 INVENTOR OSCARJSU/VDSTRA/YD. BY & I

' ATTO R N EY t. 1. 9 o. J. SUNDSTRAND 2,216,534

CARRIAGE RETURN MECHANISM FOR COMPUTING ,AND PRINTING MACHINES OriginalFiled Dec; 1'8, 1951 'r Sheets-Sheet 7 INVENTOR Q Q BY Patented Oct. 1,1940 PATENT OFFICE CARRIAGE RETURN MECHANISM Fon COM- PUTING ANDPRINTING MACHINES Oscar J. Sundstrand, Bridgeport, Conn., assignor toUnderwood Elliott Fisher Company, New York, N. Y., a corporation ofDelaware Original application December 18, 1931, Serial No.

581,800. Divided and this application December 31, 1936, Serial No.118,607

- 6 Claims.

This invention relates to bookkeeping machines, and more particularly toa carriage return mechanism therefor. This application is a division ofmy co-pending application Serial No.

581,800, filed December 18, 1931. a One of the objects of the presentinvention is to provide a highly efiicient carriage return mechanism,and one th is adapted for use in connection with bookkeeping work whereit is 10 desired. at-Jgimes to vary the carriage return in respect tothe columnar positions in which the return is begun and finished.

With these and incidental objects in view, the invention consists incertain novel features of construction and combinations of parts, theessential elements of which are set forth in appended claims, and apreferredembodiment of which is hereinafter described with reference tothe drawings which accompany and form part of 25 Figure 3 is a detailview taken on the line 8-3 of Figure 2, and looking toward the rear ofthe- In the present machine, the power used in remachine,

Figure 4 is a back view of the machine, 30 Figure 5 is a plan viewshowing the connections from the carriage return keys and the motor barto the carriagezdrive,

Figures 6 to 15 inclusive are details of the carriage return mechanism,

Figures 16 and 16*, when taken together, form a perspective view of thecarriage return keys and the motor bar, and their connections with, themachine clutch and carriage return mechanism, and Figure 17 is aperspective view showing the 40 releasing mechanism for the latch thatholds the carriage short return key in its depressed position.

General description 5 I The present mechanism is shown applied to abookkeeping machine of the ten key type provided with a travellingcarriage that is tabulated from one position to another throughout. itsworking stroke to provide for listing items in a 5-0 plurality ofvertical columns on a work sheet. This necessitates a movement of thecarriage from right to left, as viewed from the front of the machine,and thereafter a return movement from left to right. e 55 In certaintypes of work it is desirable not only to return the carriage from itsextreme left hand position to its extreme right hand position, but toreturn it from one or more intermediate positions to the extreme righthand position, or even to return it'from one or more intermediatepositions to another intermediate position. Such return to anintermediate position instead of to the extreme right hand position iscommonly referred to as a short return or shuttle movemen The returnmechanism for the present machine is provided with suitable controls towhen the carriage is tabulated into a predeter- .mined position and tobe discontinued when it has arrived in another predetermined position.Further controls are provided to cause the return mechanism to becomeeifective in any tab ular position of the carriage toreturn the car- Iriage to its extreme right hand position upon depression of the key onthe keyboard. There is b also provided an additional control to causethe return mechanism to become eflective at the will of the operator toreturn the carriage to an intermediate tabular position by depression ofan- .other key on the keyboard.

Detailed description turning the carriage is derived from the same motorthat is used to cyclethe machine. A spur gear wheel BIZ (Figures 2 and3) driven continuously during the operation of the electric motor,meshes with a spur-gear wheel 885 having 'beveled gear teeth 886 on oneside thereof that mesh with a beveled gear pinion 881, said pinion beingfixed to a vertical shaft 888. A train of gears 889, 890, 89l and 892(Figures 5 and 16*) transmits power from the shaft 888 to a. verticalshaft 893. A clutch collar 894 (see also Figures 6 to 10) is slidablebut not rotatable on the shaft893 and is adapted to engage a clutch face895 rigid with a pinion 888. Said pinion is loose on shaft 893 andmeshes with a rack bar 881 attached to the carriage. A pin 893 (Figure16) is secured in shaft 883 and extends into ,ia slot in the lower endof collar 894 to'provide the slidable and nonrotatable mounting of thiscollar on the shaft.

As is customary in machines of this character, a slippage is providedbetween the motorand the carriage to take the shock of starting thecarriage and to prevent damage to the parts if the carriage clutchshould not become disengaged when necessary. In the present mechanismthis slippage is provided for by having the gear 890 (Figure 2) made oftwo part construction, the

two parts of the gear 890 until the inertia, of the carriage issufficiently overcome.

Manual control of carriage return The means herein shown for throwing inthe carriage return clutch manually at any tabularposition of thecarriage includes a key 898 (Figures 1, 2, 5 and 16**) carried by alever 899 pivoted in the machine frame at 900 (Figure 16). A spring 901normally holds the key 898 elevated. The extent of downward and upwardmovement of such key is limited by engagement of lugs on the key lever899 with the pivot shaft 101 (Figures 2 and 16 The rear end of the lever899 is arranged to lift the clutch collar 894, the washer 902 beinginterposed between the lever and the clutch collar. The clutch collar894 is held in engaged position by a lever 903 (Figures 6 and 9) pivotedon a stud 904. One arm of the lever 903 has a lug 905 that lies within aperipheral groove 906 on the clutch collar. A tooth 901 is formed on theopposite end of the lever 903. A detent 908 is pivoted in the machineframe at 909 and has a tooth 910 corresponding in shape to the tooth901. A spring 9| I, acting on the detent 908, holds the clutch collar ineither of its two positions, and insures quick engagement anddisengagement of the clutch surfaces.

Disengagement of clutch In the return movement of the carriage, the lugs615 (Figure 16) on the forward ends of the tabular stop bars 180(Figure 1) successively pass over the upwardly extending arm of thelever 685, depressing the escapement tooth 668 on the right hand endthereof. As these stops 615 pass beyond the tooth 668 the latter springsback to its raised position where it lies in the path of these stops, aspring 614 being secured to the lever 665 for this purpose. vided with acam bar 912 (Figure-l3) which, when the carriage approaches its initialposition, engages an arm 913 formed on the lever 903, and

thereby tilts said lever against the influence of the detent 908 towithdraw the clutch collar 894 from the clutch face 895. After theclutch is thus disengaged, a spring drum 643 (Figure 4) connected to thecarriage by a flexible cable 644, moves the carriageto the left Figure16 a short distance, bringing the stop 615 for the first tabularposition against the escapement tooth 668 to arrest the carriage in itsright hand position.

Automatic engagement of carriage return clutch.

A bar 914 (Figures 6, 7, 9 and 10) is mounted on the carriage to extendlongitudinally thereof. The bar is attached to the carriage by headedstuds 915 fixed to the bar and extending through elongated openings 916-in a member fixed to the carriage. A spring 911, attached to the bar914 and to the carriage frame, normally holds the studs 915 against theleft hand end walls of the openings 916, as shown in Figure 6. A pin 918is mounted on bar '914 and is situated to engage the arm 913 as thecarriage completes its working stroke to cause the carriage returnclutch to be thrown in. The yieldable mounting of the bar 914 cushionsthe shock of engagement of the pin 918 with the arm 913.

When the carriage re-' turn is thrown in, slippage occurs between theThe carriage is pro- Carriage short return The carriage short return key919 (Figures 1 and 16 is carried by a lever 920 secured to the shaft101. An arm 921 is secured to the left end of this shaft. A spring 922,attached to the lever 920 and to a rod 923, normally holds the key 919elevated; the rod 923 serving as a stop to limit upward movement of thelever 920. When the key is in its upper position, the arm 921 restsagainst a pin 924 on a lever 925 loosely mounted on a shaft 834. Aspring 926 tends to swing the lever 925 rearwardly but is normallyrestrained by the arm 921. The lower end of the lever 925 has a pin andslot connection with a slide 921, the rear end of which is supportedupon a guide pin 928 (see also Figure 7). A vertical slot 929 is cut inthe rear end of the slide 921 to accommodate one arm of the lever 908.Lever 903 (Figures 6 and 11) is slidable on its pivot 904, making itpossible for the spring 926 (Figure 16 to slide the lever from itsnormal position, shown in Figures 7 and 9, to its rear position, shownin Figures 10 and 11, upon depression ofthe key 919. Such shifting ofthe lever 903 withdraws the arm 913 from the path a: (Figure 15) withinwhich the clutch engaging pin 918 and the clutch disengaging cam 912travel, and places said arm 913 in the path y. When in the path 11 thearm 913 will be engaged by the left hand end 930 of the bar 914, wherebythe clutch will be thrown into effect return of the carriage. A pin 931(Figure 14), moving with the carriage, engages the arm 913 in the returntravel of the carriage to disengage the clutch.

The parts 930 and 931 may be located at, any desired points along thecarriage so that they may initiate and interrupt movement of thecarriage at any desired tabular positions. It will be understood that inboth forward and rearward positions of the lever 903 the part 905 liesin the peripheral groove 906 of the clutch collar 894. At the time theshort return key 919 is utilized, the carriage is standing in one of thetabular positions. The machine, therefore, must be cycled to effecttabulation of the carriage to cause the carriage to throw in thecarriage return clutch-- in other words, to allow the part 930 (Figure10) to engage the arm 913. This is accomplished by throwing out thedetent 5115 (Figures 3 and 16 to allow the clutch elements 569 and 510to engage one another and thereby cause a cycling of the machine. Themeans enabling depression of key 919 to throw out the detent 516includes a pin 108 carried by an arm 101 loosely pivoted on shaft 101. Alever 109 is pivoted at 110, and has its upper arm lying beyond the pin108. A bar 592 has an upstanding projection 11 1 situated in front ofthe lower arm of the lever 109 and extends to the front of the machine,where it is suspended on the lower arm of a lever 593 (Figure 16*) A bar589 has a lug 590 secured to its side and lying in front of a shoulder591. Depression of key 919, by this train of connections, moves bars 592and 589 forward. Movement of the bar 589 forward, through the train ofconnections 588, 581, 586, 585 and 584 (Figures 16 and 16 causes a plate581 to oscillate counter-clockwise about its pivot 582 against thetension of a spring 583. Since plate 581 and detent 516 are both securedto shaft 582, the movement of plate 581 will throw out the detent'516 toallow engagement of the clutch element 569 and 510 (Figure 3). Theremaining details of the clutch mechanism, together with the now lies inthe path of rod 329.

details of the carriage escape nent, do not form a part of the presentinvention and are, therefore,

omitted. The carriage tabulation that takes place toward the end of theensuing cycle of the machine causes the lever 993 to be rotatedcounter-clockwise to engage the'carriage return clutch in the mannerabove explained.

Short return key latch;

immediately above the lever 933 to hold the key 9l9 depressed. In thelast half of the machine cycle the key 919 is automatically unlatched bythe latch "6 being moved forward against the tension of spring 111 bythe following means.

A rock shaft l1 (Figure 1'1) is rocked first clockwise and thencounter-clockwise during each cycle of the machine. An arm I69 issecured to the rock shaft and carries a roller 329. A lever 329 pivotedon a rod 329, engages roller 329 and carries a rod 329 at its upper end.Actuation of the rock shaft allows a suitable spring (not shown) to rocklever 329 counter-clockwise, the rock shaft then rocking lever 329clockwise, moving rod 329 first rearwardly and then forwardly in themachine. A rod '12f has-pivoted thereon" an arm 129 having a laterallyextending finger 123 adapted to'contact latch "6. A pawl H8 is pivotedto arm 129 at 1 I9 and has a notch 122 in its rear edge. When themachine is atrest, rod

329 lies in notch 122. During the first half of the machine cycle, rod329 is moved to the rear,

whereupon pawl 1) drops until its lower edge l'he rear edge of pawl 1l8During the last half of the'machinecycle, rod 329 is moved forward,moving pawl 1J8 forward and thereby causing finger 123 to move latch 1l6forward and release the depressed key 9l9, spring 922 returning the keyto its undepressed position. Continued forward movement of rod 329 toits home position causes pawl 1I8 to rock clockwise, through contact ofits lower edge with rod 294, until notch 122 falls into contact with rod329 thereby allowing arm 129 to move rearwardly a short distance. Thisallows latch 1I6 to be pulled to'the rear under the influence of spring111. ,It now lies in its normal position shown in Figures 16 and 11where it is effective as a latch for key 9! when the latter isdepressed. A

Such unlatching of the short return key occurs at about the same time inthe cycle that the rests on a rod 294.

carriage is released for tabulation. It is, therefore, necessary toprovide some means to retain the arm 9l3 in the path 11 until the parts939 and 93I exercise their control on the arm 913 to produce the shortreturn movement. As shown in Figures 8 and 12, the arm of the lever 993that is engaged by the detent 998 is'rabbeted to providetwo surfaces934, thus producing locking shoulders 935 and 936. When the lever 993 isshifted to its rear position, the detent 999 springs into engagementwith the lower surface 934 (as shown in Figure 8), whereby the detentlies in front of the locking shoulder 935 and holds the lever 993 in itsrear position after the short return key 91.9

is released by the latch 1|6, the releasing of the key 9l9 causing atensioning of av spring 931 (Figure .16) connected to lever 925 and toslide 921. The shoulder 935 thus retains the arm '9I3 in the path y longenoughv for the part 939 to reach and operate the arm 9l3'to throw inthe carriage return clutch. The tilting of the lever 993, as the clutchis .thrown in, places the locking shoulder 936 behind the detent. 9l9,whereby the arm M3 is retained in the path y and the pin 93! can reachand operate the arm 9l3 to disengage the clutch (see Figure 14) As shownin'Figure 12,'

the shoulder 936 is a short distance behind the shoulder 935. When theclutch is thrown in and the shoulder 936 is placed behind the detent9l9, the spring 931 (Figure 16), being at this time under tension, pullsthe lever 993 forward until the shoulder 936 bears against thedetent.9l9, this movement of the lever 993 being insuflicient towithdraw the arm 9| 3 from the path 1 When.

the clutch is disengaged by the pin 93], detent 919 is forced from theupper surface 934 to the lower surface 991, as will be understood fromFigure 12, thereby permitting spring .931 to shift the lever 993 intoits normal forwardposition.

Time switch and 'its control by carriage return and short returnfkeys Inthe circuit of the motor 26 is a switch (notshown) which is arranged. tobe operated by means of a lever 596 (Figuresl and 5). Means is alsoprovided for automatically opening the motor circuitafter the lapse of abrief period, say, one or two minutes, following the last-cycle ofoperations of the machine, so that in the event that the operator failsto open-the switch by means of the lever 596, the motor will beautomatically stopped. This means comprisesa switch in series with thefirst mentioned switch and consists of contacts 591 and 598 (Figures 5and 16?). The contact 598 is arranged to be withdrawn from the contact591.

by means of a lever 599 pivoted at 699. Pivoted to the lever. 599 is alink 691. A cam 692 is fixed to a gear wheel 693 that meshes with apinion 694. Fixed to thepinion 694 is a ratchet wheel 695 arranged to beturned by a dog 696. A spring 691 tends to move the dog 6.96 in thedirection to turn the ratchet wheel 695. The diig is moved in theopposite direction by means 0 a link-698 (Figure 16) which connects saiddog to the upper arm of a lever 699 pivoted on the axis 6| 9. The lowerarm of the lever 699 is arranged to be engaged by a pin 6 (Figure 2)carried by a gear wheel 6| 2 rigid with the hub or tubular shaft 568(Figure 3). The gear wheel H2 is driven continuously during theoperation of the motor. It will be seen that the pin 6 69l tends to movesaid link in the directionato 'close the contacts. 591 and 598, and alsoholds the link 69l in position for actuation by the cam 692. 6 is a stoppin for the link 69I. On the lower side of the link 69! is a stud 6l5arranged at times to bear against the periphery of the cam and at othertimes to rest on the upper side of the cam. On the upper side of the camis a pin 6l6 adapted to engage the edge 6" of the link 69L The end ofthe link 6! is arranged to be engaged by a pin ("8 on the ratchet wheel695. M9 is an anti-returndo for the ratchet wheel 696. 1

The link GM is arranged to be lift ed until the stud 6l5 is above thehorizontal plane of the top of the cam 602, to allow the spring 6| 3 tomove the link against the stop 6, and place the stud M5 on top of thecam. The means for lifting the link 6M comprises a slide 620 (Figure 2)the rear end of which extends through an opening 62l (Figure 3 in aplate 522 in the machine frame. The rear end of the slide underlies thelink 60L On the rear end of the slide 620 is an inclined surface 623that bears against the rear end wall of the opening 62L The front end ofthe slide 620 is pivoted at 624 to the lever 58L When the short returnkey 9|9 is depressed, the lever 58l swings counter-clockwise, asdescribed above, pushing the slide 620 rearwardly and raising the link6M so as to permit the spring 6|3 to place the link GUI against the stoppin 6M. The stud 6|5 then supports the link on top of the cam. The pinBIG is not of sumcient height to engage the link when the latter is thussupported. When the shoulder 625 of the cam revolves out from under thestud M5, the link 60l drops until it rests on top of the cam, the stud6I5 being then alongside the low part of the periphery of the cam, andthe free end of the link being at the right of the orbit of the pin 6l8on the ratchet wheel. As thecam continues to revolve, the pin BIBengages the edge 6H of the link EDI and swings said link to the left,thus placing the free end of the link in the path of the pin (H8. Whenthe pin H8 engages the link till, the latter is pushed rearwardly .tomove the contact 599 away from the contact 591, and thus open the motorcircuit.

From the description of the above parts, it is seen that if the machinehas been left idle for a sufiicient length of time to allow the pin M8to open the contacts 591 and 598, depression of the short return key9I9, together with the accompanying counter-clockwise rotation of arm58! (Figure 2.) causes the link 620- to be moved to the rear and thelink 60! to be raised high enough for the forward end of the link toclear the pin 6l8, allowing the spring 6l3 to close the contacts 591 and598 to start the machine.

A lever 695 (Figures 2, 5 and 16 is pivoted at 696 and has a laterallyextending arm 69! underlying the carriage return key 898. A spring 90!holds the front end of the lever in its raised position. The rear end ofthe lever 695 has a lug 698 turned thereon and underlying the link 620.The provision of this mechanism enables a depression of the carriagereturn key 898 to pivot the link 620 about the connection 624, raisingthe rear end of the link sufiiciently to raise the forward end of link60l above the pin SIB. 1 In this manner, a depression of the Carriagereturn key 898, as well as the Short return key '9l9, closes the motorcircuit if it has been previously opened by the time switch.

While the form of mechanism herein shown and described is admirablyadapted to fulfill the objects primarily stated, it is to be understoodthat it is not intended to confine the invention to the one form ofembodiment herein disclosed for it is susceptible of embodiment invarious forms' all coming within the scope of the claims which follow.

What is claimedis:

v 1. In a printing machine, the combination of laterally movablecarriage, a set of maximumlimit stops on the carriage, a set ofintermediatelimit stops on the carriage, said sets of stops beinglocated in different planes, carriage-return mechanism including aclutch and a member adapted to engage and disengage the clutch, themember being movable into the plane of either set of limit stops, andmanipulates means for adjusting the position of said member.

2. In a printing machine, the combination of a laterally movablecarriage, a set of maximumlimit stops on the carriage, a set ofintermediatelimit stops on the carriage, said sets of stops beinglocated in different planes, carriage-return mechanism connectible withand disconnectible from the carriage, means movable into the plane ofeither set of limit stops for controlling the connection anddisconnection of the carriage and the carriage return mechanism,manipulative means for adjusting the position of said controlling means,a latch to hold said manipulative means in operated position, meansactuated in the cycling of the machine for moving the latch to releasethe'manipulative means, and means to hold the controlling means inadjusted position after said latch has been released and until one ofsaid limit stops has operated said controlling means.

3. In a printing machine, the combination of a laterally movablecarriage, a clutch member for driving the carriage in the .returndirection, a lever connected to said clutch member to shift the sameinto and out of driving position, a pair of members carried by thecarriage and arranged to engage an arm of said lever, one of saidmembers engaging said arm to throw in the clutch and the other memberengaging said arm to throw out the clutch, another pair of members onthe carriage arranged to engage the last-mentioned arm of said lever tothrow the clutch in and out, respectively, said pair of memberstraveling in a different path from that taken by the firstmentioned pairof members, said lever being shiftable into and out of either of saidpaths, and means for shifting the lever from one path to the other.

4. In a printing machine, the combination of a laterally movablecarriage, a clutch memberv for driving, the carriage in the returndirection, a lever connected to said clutch member to shift the sameinto and out of driving position, means carried by the carriage andarranged to engage said lever to throw the clutch in and out, othermeans on the carriage arranged to engage said lever to throw the clutchin and out, said other means traveling in a different path from thattaken by the first-mentioned means, said lever being shiftable into andout of either of said paths, manually operable means for controllingshifting of the lever from one path to the other, a spring tending toshift the lever in the opposite direction, a latch to hold said manuallyoperable means in operated position, means actuated in the cycling ofthe machine for releasing the latch, and means to hold said lever inadjusted position after said latch has been released and until the leveris operated to shift the clutch element.

5. In a machine of the class described, a laterally movable papercarriage, means to limit its travel in both directions, intermediatemeans to limit its travel in both directions, carriage return thecarriage is traveling in either direction, and means for so moving saidmember.

6. In a machine of the class described, a laterally movable papercarriage, means to limit its travel in both directions, intermediatemeans to limit its travel in both directions, the two means beinglocated in different planes, carriage return mechanism connectible toand disconnectible from the carriage, a controlling member forcontrolling the connection and disconnection of the carriage and thecarriage return mechanism, the member being movable into the plane ofeither of said means to cooperate therewith when the carriage istraveling in either direction, and means to move the member into theplane 01 eitherof said means.

OSCAR J. SUNDS'I'RAND.

CERTIFICATE OF CORRECTION.

Patent No. 2,216, 65h. October 1, 191m.

OSCAR J. sunnsmm.

It is hereby certified that error appears in the printed speeificstionof the above numbered patent requiring correctionas follows: Page 14.,sec-- 0nd column, line )4, claim}, for the word "manipulates" read-ma.n1pu1a tive--; and that the said Letters Patent shouid be read withthis correction therein that the sememay conform to the recerd of thecase 11; the I Patent Office.

Signed and sealed this 12th giay of November, A. D. 1914.0.

Henry Van Arsdaie, (Seal) Acting Commissioner of Patents.

